Analytic RF design of a linear accelerator with a SLED-Ⅰ type RF pulse compressor  

作　　者：Jia-Yang Liu Jia-Ru Shi Hao Zha Alexej Grudiev Ping Wang Ying-Chao Du Huai-Bi Chen 

机构地区：[1]Department of Engineering Physics,Tsinghua University,Beijing 100084,China [2]Key Laboratory of Particle and Radiation Imaging(Tsinghua University),Ministry of Education,Beijing 100084,China [3]European Organization for Nuclear Research(CERN),1211 Geneva,Switzerland

出　　处：《Nuclear Science and Techniques》2020年第11期12-22,共11页核技术（英文）

摘　　要：This study presents the RF design of a linear accelerator(linac)operated in single-bunch mode.The accelerator is powered by a compressed RF pulse produced from a SLED-I type RF pulse compressor.The compressed RF pulse has an unflattened shape with a gradient distribution which varies over the structure cells.An analytical study to optimize the accelerating structure together with the RF pulse compressor is performed.The optimization aims to maximize the efficiency by minimizing the required RF power from the generator for a given average accelerating gradient.The study shows that,owing to the compressed RF pulse shape,the constant-impedance structure has a similar efficiency to the optimal structure using varying iris apertures.The constant-impedance structure is easily fabricated and is favorable for the design of a linac with a pulse compressor.We utilize these findings to optimize the RF design of a X-band linac using the constant-impedance accelerating structure for the Tsinghua Thomson X-ray source facility.

关 键 词：X-band linac High gradient structure RF pulse compressor Thomson X-ray source Single-bunch mode 

分 类 号：TL53[核科学技术—核技术及应用]